Configuring Routers
Oh No! I’ve got to program a router!
What do I have to do
Router>
Router>enable
Router#
Router#config t
Config t is the place to be!
Log on to the router
Name the router!
Router(config)#hostname Lab
-
A
Step One
Lab
-
A
Password protect the Privilege
Mode
Step Two
Lab
-
A(config)#enable secret class
enable secret 5 $1$emBK$WxqLahy7YOAf0nifub.hU
Results in:
Password
Commands
Configure the Interfaces
Step Three
Lab
-
A(config)#interface serial0
Lab
-
A(config
-
if)#
(
Note prompt change)
Address the Interface(S0)
Lab
-
A(config
-
if)#ip address 201.100.11.1 255.255.255.0
Ip address
Subnet mask
S0=201.100.11.1
S0
Clock ticks MUST be set
between routers on the interface
with the serial cable DCE end.
Serial0 is where the
DCE connects in our
lab.
We use Serial0
•
Lab
-
A(config
-
if)#clock rate 56000
Address the next Interface (E0)
Lab
-
A(config
-
if)#ip address 192.5.5.1 255.255.255.0
Lab
-
A(config
-
if)#interface ethernet0
(
This changes to program interface e0)
S0=201.100.11.1
E0=192.5.5.1
E0
S0
Address the next Interface (e1)
Lab
-
A(config
-
if)#ip address 205.7.5.1 255.255.255.0
Lab
-
A(config
-
if)#interface ethernet1
(
This changes to program interface e1)
S0=201.100.11.1
E0=192.5.5.1
E1=205.7.5.1
S1=No address
E1
S0
E0
Control z
Lab
-
A#
Lab
-
A#show running
-
config
Results:
•
version 12.0
•
service timestamps debug uptime
•
service timestamps log uptime
•
no service password
-
encryption
•
service udp
-
small
-
servers
•
service tcp
-
small
-
servers
•
!
•
hostname Lab
-
A
•
!
•
enable secret 5 $1$emBK$WxqLahy7YOAf0nifub.hU.
•
!
•
ip subnet
-
zero
--
More
--
interface Ethernet0
ip address 192.5.5.1 255.255.255.0
no ip directed
-
broadcast
shutdown
!
interface Ethernet1
ip address 205.7.5.1 255.255.255.0
no ip directed
-
broadcast
shutdown
--
More
--
interface Serial0
ip address 201.100.11.1 255.255.255.0
no ip directed
-
broadcast
no ip mroute
-
cache
clockrate 56000
shutdown
!
interface Serial1
no ip address
no ip directed
-
broadcast
shutdown
Like people, routers have to talk
to one another!
Like people, routers have to talk
to one another!
Step Four
Set up routing protocols
Routing Protocols:
RIP
RIPv2
IGRP
EIGRP
OSPF
Set up the routing protocol
Lab
-
A(config)#router rip
Lab
-
A(config
-
router)# version 2
Lab
-
A(config
-
router)#network 192.5.5.0
Lab
-
A(config
-
router)#network 207.7.5.0
Lab
-
A(config
-
router)#network 201.100.11.0
(
Note prompt change)
Note!
•
You have to configure for EACH network
•
(remember network # is the “wire” #)
•
Each network is on a separate line
•
Hit Control z to activate and return to:
•
Lab
-
A#
Lab
-
A#show run
!
router rip
version 2
network 192.5.5.0
network 201.100.11.0
network 205.7.5.0
!
(
router portion of show run)
Control Access
Control and secure access from:
CONSOLE
VTY (telnet)
AUX (modem)
Control Access
Step Five
Lab
-
A(config)#line console 0
Lab
-
A(config
-
line)#password cisco
(
Note prompt change)
Lab
-
A(config
-
line)#login
Continue
Lab
-
A(config)#line vty 0 4
Lab
-
A(config
-
line)#password cisco
Lab
-
A(config
-
line)#login
Control Z
(typing the word “exit” at the prompt takes
you up one level)
Lab
-
A#show run will give the following results:
line con 0
password cisco
login
transport input none
line aux 0
line vty 0 4
password cisco
login
Want to save time and move fast
between routers?
Step Six
A REAL time Saver!
Lab
-
A(config)#
ip host Lab
-
A 192.5.5.1 205.7.5.1 201.100.11.1
Lab
-
A(config)#
ip host Lab
-
B 219.17.100.1 199.6.13.1 201.100.11.2
Lab
-
A(config)#
ip host Lab
-
C 223.8.151.1 204.204.7.1 199.6.13.2
Lab
-
A(config)#
ip host Lab
-
D 210.93.105.1 204.204.7.2
Lab
-
A(config)#
ip host Lab
-
E 210.93.105.2
Lab
-
A(config)#control z
Turn on the interfaces:
•
Lab
-
A(config)#interface s0
•
Lab
-
A(config
-
if)#no shutdown
•
Lab
-
A(config
-
if)#interface e0
•
Lab
-
A(config
-
if)#no shutdown
•
Lab
-
A(config
-
if)#interface e1
•
Lab
-
A(config
-
if)#no shutdown
Step Seven
For Lab
-
A router, you
are through!
Program the other routers the
same way, BUT:
•
Use the interfaces in use on each particular
router
•
Use the correct ip address/network address
for each port on that router
•
Check and save your configuration!
•
Router#show run
(Check)
•
Router#copy run start
(S
ave)
Let’s Review:
•
Step 1
–
name router
•
Hostname xxxxx
•
Step 2
–
set “privilege” password and
encode it
•
Enable secret xxxxx
•
Step 3
–
configure interfaces
•
Interface sX (or eX)
•
Step 4
–
Set the routing protocols
•
Router rip
•
Step 5
–
Set who and where access comes
from
•
Line console (vty)
•
Step 6
–
Save Time
•
Ip host xxx.xxx.xxx yyy.yyy.yyy
•
Step 7
–
Turn on interfaces
•
Router(config
-
if)#no shutdown
Check and Save your work!
•
Check your config
•
Router#show run
•
Save your configuration from RAM to
NVRAM
•
Router#copy run start
You’re Through!
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